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首页> 外文期刊>Energy & environmental science >Comment on 'ferroelectricity-free lead halide perovskites' by A. Gomez, Q. Wang, A. R. Goni, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537
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Comment on 'ferroelectricity-free lead halide perovskites' by A. Gomez, Q. Wang, A. R. Goni, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537

机译:评论A. Gomez,Q. Wange,A. R. Goni,M. Campoy-Scililes和A. Abate,Energy Enview,A. Gomez,A.王,A. R.Goni,A. Abale,能源环境评估。 SCI。,2019,12,2537

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摘要

This article comments on the recent publication "Ferroelectricity-free lead halide perovskites" by Gomezet al.[DOI: 10.1039/c9ee00884e], in which the authors conclude that both methylammonium lead iodide (MAPbI(3)) and the more advanced Cs-0.05(FA(0.83)MA(0.17))(0.95)Pb(I0.83Br0.17)(3)form non-ferroelectric thin-films. This conclusion is based on measuring the vertical piezoelectric effect by "direct piezoelectric force microscopy" (DPFM) and not seeing any domain patterns or other ferroelectric responses. The authors calibrated their measurement using a bulk reference sample of periodically poled lithium niobate with vertical polarization, which has all-different properties from MAPbI(3)or Cs-0.05(FA(0.83)MA(0.17))(0.95)Pb(I0.83Br0.17)(3)thin-films. In earlier works, it was pointed out that the polarization in large MAPbI(3)grains is vastly oriented in-plane and hence could remain invisible to any probing techniques with vertical sensitivity. In addition, the low spatial resolution of their measurements, the strong measurement noise, potential adventitious water contamination and the use of improper cantilever loads reduces the sensitivity of the measurement setup. This is why the conclusion on MAPbI(3)being non-ferroelectric is not supported by the measurement data.
机译:本文通过Gomezet Al的最近出版物“铁电无线卤化卤化卤化卤化物”评论。[DOI:10.1039 / C9EE00884E],其中作者得出结论,甲基丙二酸碘化物(MAPBI(3))和更先进的CS-0.05 (FA(0.83)MA(0.17))(0.95)Pb(I0.83BR0.17)(3)形成非铁电薄膜。该结论是基于通过“直接压电力显微镜”(DPFM)测量垂直压电效果,而没有看到任何域图案或其他铁电反应。作者使用具有垂直极化的散装钼铌酸铌的体积参考样品进行校准它们的测量,其具有来自MAPBI(3)或CS-0.05(FA(0.83)MA(0.17))(0.95)PB(I0)的全不同性质(I0 .83br0.17)(3)薄膜。在早期的作品中,指出,大型MAPBI(3)颗粒中的极化在面内绝值导向,因此可以对具有垂直灵敏度的任何探测技术保持不可见。此外,其测量的低空间分辨率,强烈的测量噪声,潜在的不定液污染和不正确的悬臂载荷的使用降低了测量设置的灵敏度。这就是为什么Mapbi(3)的结论不支持测量数据不支持。

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    《Energy & environmental science》 |2020年第6期|1888-1891|共4页
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    Karlsruhe Inst Technol Light Technol Inst LTI Engesserstr 13 D-76131 Karlsruhe Germany|Karlsruhe Inst Technol Mat Res Ctr Energy Syst MZE Str Forum 7 D-76131 Karlsruhe Germany;

    Karlsruhe Inst Technol Light Technol Inst LTI Engesserstr 13 D-76131 Karlsruhe Germany|Karlsruhe Inst Technol Mat Res Ctr Energy Syst MZE Str Forum 7 D-76131 Karlsruhe Germany;

    Karlsruhe Inst Technol Light Technol Inst LTI Engesserstr 13 D-76131 Karlsruhe Germany|Karlsruhe Inst Technol Mat Res Ctr Energy Syst MZE Str Forum 7 D-76131 Karlsruhe Germany;

    Karlsruhe Inst Technol Light Technol Inst LTI Engesserstr 13 D-76131 Karlsruhe Germany|Karlsruhe Inst Technol Mat Res Ctr Energy Syst MZE Str Forum 7 D-76131 Karlsruhe Germany;

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